Gas-producer.



Patented Nov. l8, I902.

J. A. MITCHELL.

No. 7l4,003.

GAS PRODUCER.

(Application filed Jan 28, 1902.)

2 Shaets-Sheei 2.

(No Model.)

WITNESSES .Josepk ATTO EYS m: mnnls mans 00.. Pimmumq. WASNINGTON. u. c,

UNITED STATES PATENT @EEICE.

J OSEPH A. MITCHELL, OF BROOKLYN, NEW YORK.

GAS-PRODUCER.

SPECIFICATION forming part of Letters Patent N 0. 714,008, dated November 18, 1902. Application filed January 28, 1902. Serial No. 91,596. (N model.)

10 (M6 whom, it may concern:

Be it known that I, JOSEPH A. MITCHELL, a citizen of the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved Gas-Producer, of whichthe following is a full, clear, and exact description.

This invention relates to an apparatus for producing gas; and it comprises certain novel features of construction and arrangement, which will be fully described hereinafter and pointed out in the claims.

This specification is an exact description of one example of my invention, while the claims define the actual scope thereof.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a front elevation of a device embodying my invention. Fig. 2 is a vertical section thereof. Fig. 3 isa top view, and Fig. t'is a horizontal section.

5 indicates the base of the generator, which is provided with inner and outer walls forming the base hollow, as shown, and the base is fitted with a manhole 6, which enables access to be had to the interior of the hollow base, so as to clean out soot and other foreign matter which may accumulate therein.

7indicates the side wall of the furnace, and 8 indicates a hollow top or head. This top or head 8 is formed with a passage 9 therein, through which the fuel is fed into the generator.

10 indicates a hood over the opening or passage 9, and 11 indicates the chute or other feed device by way of which the fuel passes into the hood 10 and through the opening 9. The fuel may be fed through the chute 11 by any desired means.

12 indicates a charging-bell which is placed in the passage 9, and 14 indicates suitable devices for operating this bell.

Packing-holes 15 are formed in the head 8,

and plugs 16 are placed therein normally to close them. 'As shown in Fig. 3, these barring-down holes are preferably four in number, although obviously that number may be increased or diminished at will.

17 indicates manholes in the top 8, through which manholes access may be had to the interior of the top for the purpose of cleaning it and also for cleaning the air-blast pipe, as will be hereinafter fully described.

18 indicates a blast-twyer which leadsinto the hollow head or top 8. This blast-twyer may, if desired, be connected with any suitable form of blower, or the air-current may be induced by a steam-jet led through apipe 19, as shown. If an air-blower is used, a certain quantity of water should be sprayed into the blast to-give it the necessary moisture; but when the blast is induced by the steamjet the necessary moisture will be derived from the steam itself.

20 indicates air-blast tubes, which may be of any number desired. According to the construction here shown they are four in number. These tubes pass down vertically from the head or top 8 through the wall 7 of the furnace and down into the hollow base 5. The tubes are located directly under the manholes 1'7, so that bars or other cleaning devices may be forced down through the tubes to clean them out. The blast entering from the twyer 18 passes through the hollow head or top 8 and down the tubes 20, and it is here highly heated, so that when it reaches the hollow base 5 it is hot and delivered in condition to .readily facilitate combustion within the generator.

21 indicates a hollow column mounted within the base 5 and communicating with the interior thereof. In this column is arranged to turn a tubular journal 22, having aflange 23 bearing on a flange 24 of the column 21 and having antifriction bearing-balls 25 interposed between the two parts. The tubular journal 22 carries a grate 26, which is in conicalform, perforated throughoutits area. On the conical grate 26 is a spiral thread 27, which turns down from the apex of the grate. The grate is formed with a peripheral flange 28, which projects under an inwardly-disposed ledge 29 at the upper end of the hollow base 5.

30 indicates a worm-wheel fastened to the grate, and 31 (see the dotted lines in Fig. 4;) indicates a worm working with the wormwheel and carried on a shaft 32, mounted on the base 5 and extending outside the same.

33 indicates a sprocket-wheel or other means for transmitting motion to the shaft 32.

34 indicates a manhole in the wall 7, and 35 indicates the ash-doors, which may be held closed by any suitable meansfor example, the bar 36 and lock-screws 37, as shown.

The wall 7 of the furnace is provided with peep-holes 38, which are covered by disks 39, mounted to turn around centers 40 and having each an opening 41 and a mica-covered observation-orifice 42. By turning the disks 39 the openings 41 may he brought opposite the peep-holes 38, so that the holes may be cleaned out by a bar inserted thereinto, and then by turning the disk 39 the mica-covered observation-orifice 42 may be placed opposite the peep-hole and the condition within the furnace viewed without danger to the eyes of the observer.

43 indicates the discharge orifice or flue, whereby the gaseous products of the furnace are carried off.

In the operation of the generator the fuel is charged through the opening 9, and the fire works upward from the grate. The continued rotation of the grate and the action of the spiral thread 27 causes the ashes to be dragged down under the ledge 29 and into the ash-pit in the base 5, while the heated blast passing up through the tubular parts 21 and 22 and through the tubular grate 26 acts continually on the fire to maintain combustion. The condition within the furnace may be viewed at any time through the peep-holes 38, and the fire may be barred down when desired by inserting a bar through any one of the openings 15 in the head 8. The tubes 20 may be readily cleaned by bars inserted through the manholes 17. The top or head 8 and the other similar metallic parts are preferably formed of cast-iron.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A gas-producer, comprising side walls, a base formed of inner and outer walls producing a chamber extending along the sides and bottom of the base, a hollow column mounted in the base and communicating with said chamber at the bottom of the base, a grate sustained on the column, a hollow head having means for receiving the air-blast, and means establishing communication between the hollow head and base.

2. A gas-producer, comprising side walls, a base formed of inner and outer walls producing a chamber extending along the sides and bottom of the base, ahollow column mounted in the base and communicating with said chamber at the bottom of the base, a grate sustained on the column, a hollow head having means for receiving the air-blast, and'means establishing communication between the hollow head and base, said means comprising a tube passing down through the side walls from the head to the base.

A gas-producer, comprising side walls, a hollow base on which said walls are sustained, a grate mounted on the base, means communicating with the hollow base for projecting a current of air through the grate, a hollow head placed on the walls and adapted to receive a blast of air, and a pipe passing vertically through the side walls from the hollow head to the hollow base, for the purpose specified.

4. A gas-producer, comprising side walls, a base formed of inner and outer walls producing a chamber extending along the sides and bottom of the base, a hollow column mounted in the base and communicating with said chamber at the bottom of the base, a grate sustained on the column, a hollow head having means for receiving the air-blast, and means establishing communication between the hollow head and base, and the said hollow base having an inwardly disposed hoilow ledge overhanging the edges ofthe grate, the said grate being circular and being separated at its periphery from the inner side walls of the base.

5. In a gas-producer, the combination of side walls, a hollow base on which said walls are sustained, a hollow column mounted in the base and communicating with the interior thereof, a grate carried on the column, a hollow head mounted at the top of the walls and adapted to receive an air-blast, and means establishing communication between the hollow head and the hollow base.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOSEPH A. MITCHELL.

Witnesses:

WILLIAM LUZIUs, RODNEY D. ELLSWORTH. 

